<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
    <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
</head>
<body>

     <img id="meinv" src="">
       <!--注意这里的iframe标签-->
     <iframe  name="post_frame" style="display:none;"></iframe>
 
      <form id="photo_upload" action="ceshi.php" method="post" target="post_frame" enctype="multipart/form-data">              
        <table width="100%" cellspacing="0" cellpadding="0" border="0" >
          <tbody>
            <tr>  
              <th style="border-bottom:1px solid #D1E0EB;text-align: right;">主题封面图：</th>
              <td style="border-bottom:1px solid #D1E0EB">
                <input type="file" id="file" name="opus" value="" width="200" /> <input style=" height: 40px;width: 45px;" type="submit" value="上传" name="submit" />  <span> 图片格式 jpg  jpeg gif  png  </span>
                <input name="callbackUrl" value="callback.php"  />
              </td>
            </tr>
          </tbody>
        </table>
      </form>
 
      <form action="dayin.php" method="post">
        <table width="100%" cellspacing="0" cellpadding="0" border="0" >
 
           <tr>
              <th style="border-bottom:1px solid #D1E0EB;text-align: right;">封面图URL：</th>
              <td style="border-bottom:1px solid #D1E0EB">
                <input type="text" id="cover_img_url" name="cover_img_url" size="120" placeholder="请输入图片地址" value=""/>
                <button type="submit" class="btn btn-danger">提交</button>
                <span>*<span style=" height: 100px;" id="show_img"></span></span>
              </td>
            </tr>
      </table>
    </form>

      <button type="button" class="dd" onclick="myFunction()">点我</button>
      <div class="bian">dsss</div>
      <script type="text/javascript">
        $(function(){
           $(".dd").click(

            function myFunction(){

             var x=$("#cover_img_url").attr("value");
             $(".bian").text(x);

            }

          );

        });
      </script>
</body>
</html>